Trolley-base.



` PATLNTLD JULY 28 o. M. sToKLs s. W. F. LNsoR.

TROLLEY BASE AEPLIUATION `FILED SEPT. 23, 1907.

UNTTED STATES PATENT OFFICE.

CHARLES M. STOKES AND WILLIAM F. ENSOR, OF BRADFORD, PENNSYLVANIA, ASSIGNORS OF ONE-THIRD TO JOHN W. BARNES, OF BRADFORD, PENNSYLVANIA.

TROLLEY-BASE.

l Specification-of Letters Patent. y

Patented July 28, 1908.

- Application filed September 23, 1907. Serial No. 394,220.

T o all whom it may concern:

Be it known that we, CHARLES M. SToKEs and WILLrAM F. ENsoR, citizens of the United States, residing at Bradford, Pennsylvania, have invented certain new and useful lmrovements in .Trolley-Bases, of which the following is a specification.

Our invention relates to improvements in trolley bases and is'designed mainly to provide a simple, durable and efficient construction'containing a minimum number of parts, ca able of quick and easy adjustment.

e have also aimed to provide a construction whichfshall be practically dust and water proof and self-lubricating.

With these and other objects in view the invention includes the features of construction and arrangement and combination of parts hereinafter describedl and particularly set forth in the appended claims.

A trolley base constructed in accordance with our invention is shown in thev accompanying drawings, in which,-

Figure 1 is a sectional elevation, Fig. 2 a plan View. Y

Referring by reference characters to this drawing, the numeral 3 designates a socket plate which is designed to be secured to the roof of a car by means of bolts or any other suitable fastenings. lhis socket plate is providedwith a depressed socket portion 4' which forms an oil cup and has an inner depending annular flange or wall 5 which is spaced from the annular wall of thel portion 4 to provide a larger interior oil chamber, and which forms a bearing for the central stud 6 which projects below the annular flange 5 and into the oil contained within the receptacle. The stud has a head portion 7 which may conveniently be made of semi-spherical form and fit a corresponding seat 8 formed on or carried by the said stud plate and also an annular depending flange 7 a serving as an effective dust guard. A cylinder 9 carried by and preferably formed integral with the head 7 of the stud extends horizontally therefrom as shown.` Within the cylinder is located a spring 10 which bears at the outer end against the adjustable abutment 11 and at its inner end against the movable plate or member 12 or plunger.

The trolley ole not shown is designed to be secured to tlf otally mounted etween ears 14e-which are 'stantly upward against the wire.

e ole socket 13, which is pivcarried byV or formed integral with the head of the stud, the pole socket being preferably pivotally secured in place by a transverse pin 15. The end of the ole socket is projected beyond the pivot ass own at 16 and the link 17 connects this with the plunger or movable element 12. lt will thus be seen that when the ole and its socket 13 is swung towards the eft and downwards it will, through the link connection 17, push upon the lunger 12 and compress the spring. The e ect of this will be to keep the trolley wheel pressed con- The end of the spring socket 9 is covered by a screw cap 18 which may be removed for the insertion and removal of the spring and co-acting parts within the spring. A screw bolt 19 passes through this cap and bears against the adjustable abutment 11 and by these means the tension of the s ring may be varied.

ln order to enable the poles to be readily attached and detached from the pole socket and also to provide means whereby different sizes of poles may be clamped in place, we prefer to form the pole socket with a semicircular channel in one side as indicated at 20, the pole'being held in these sockets by sta,- ples 21 which have. screwed ends passing through perforated lugs 22 and provided wlith nuts 28 for clamping them tightly in ace. p From the foregoing description it is thought that the operation and advantages of our invention will be apparent.

lt lwill be clear that the device will be selflubricating as it will not only retain the oil in the socket plate and feed it as required, but will allow no portion of it to escape and smear other parts of the base. Further, the spring is entirely inclosed and' protected from the weather and fromdust and dirt, thereby adding to the lifetime of the device and insuring its efficient operation. Again, with only a minimum number of parts any desired tension may be placed on the pole and it will, when not restrained by the trolley wire, take an uprightposition.

Having thus described our invention what we claim is 1. In combination a socketplate, a stud j ournaled therein said socket plate having an annular oil chamber encircling the stud, and

an annular wall depending into said chamber and within which the stud turns, a pole socket pivotally carried by the stud, and a l the pole socket piece and the plunger, subspring for exerting tension on the pole socket, i stantially as described.

substantially as described. 7 In testimony whereof, We aHiX our signa- 2. Ip combination a socket; plate, a1 stud tures in presence of two Witnesses. 5 journa ed therein a cylinder projecting aterally from said stiid, a spring Within the'cylinder, an adjustable abutment on the outer end of the cylinder, a plunger in the opposite Witnesses: end, a pole socket piece pivotally mounted J. W. BANES, 10 upon the stud, and a link connection between ELIZABETH O MEARA- 

